Mold for pneumatic tires for vehicles.



EJ HOPKiNSDN,

MOLD FOR PNEUMATIC TIRES FOR VEHICLES.

APPLICATION FILED JAN. 3!

' Yatented Dec. 31, 1918.

(ac-pending application,

' UNITED STATES ERNEST HOPKINSON, OLE NEW YURK,

MOLD FOR PNEUMATIC TIRES FOR VEHICLES.

Specification of Letters Patent Application filed January 31, 1918. Serial No. 214,610.

To all iv/LOW, it may concern:

Be it known that l, ERNEST HormNsoN,

a citizen of the United New York, county of N e States, residing at w York, and State of New York, have invented certain new and useful Improvements in Molds for Pneumatic Tires for Vehicles, of which the following is tion.

a full, clear,

and exact descrip- This invention relates to molds for use in the manufacture of tires and is directed more particularly to the is used 1n the tire casings.

type of mold that manufacture of pneumatic The principal object of the invention to devise a mold forme may be readily secured tire by simple devices t and quickly applied and which make it feasible to paratively simple design and considera ly reduced in weight;

Referring to the drawings forming part' v f employed to directly engage all the clamps sectional view of of this specification Fi ure 1 is a transverse d in sections that together about the but may be easily use a mold of coma mod showing the preferred-embodimentof my invention with a ti in, and

re supportedthere"- Fig. 2 is a plan view of the mold shown'in Fig. 1. p

This invention is a vcnt ion set forth in my cation Serial N 0. 214,609

be made thereto for a more modification of my inco-pending ap liand reference may detailed description of the subject matter common to both applications.

n the present case, the tire I may be supported interiorly in any desired manner, as

for instance by the rim 2 and the fluid under pressure introduced into the tire cavity 3 through the tube 4, and exteriorly by the mold members 5 43.

ilar to those shown in m These parts are simremoved and 'enoy thereof by ma ifeven be spaced from each other if desired locking means he spaces 7[ The clamps may be secured either from the" inner or outer circumferences of the mold sections as may be desired. but in the present instance they are shown as positioned on the inner circumference thereof, and the webs 8 of the clamps as preferably made arcshapcd to conform to the inner instance; the locking means is shown in the form of a band or "ring, but it is obvious that other forms may be used, it only being desired that there be no interdependof the clamps in efitecting theloeking the said means and they and that a single integral simultaneously to secure them against acy above mentioned but it will be undcrstood that my invention is not limited. to

any particular type of i supporting members.

The clamps 6 may be aspects to the clamps pending application, but stance I have provided a nterior or exterior similar in all rcdescribed in my coin the present inlockmg means for the clamps which has independent engage ment with each of the clamps, so that the latter may be entirely independent of each other and are, in fact, as shown in Fig. 1 Wll refer-ably arranged h the intervening movement toward the .circumTerence (n being moved about or durin .the vulcaniz ing process if desired. The 0 amps are preferably arranged to form a circumference with a face of their webs adjacent the me d. sections. The locking band. or ring s ans the several clamps on the opposite si e of the webs and forms an abutment for each clamp to prevent its displacement-by (radial In the present instance, theclanips hold the mold members from the inner circumfcrcnce thereof, and one or more of the clamps are provided with lugs 12 which serve to support the ring. The ring may be conveniently provided Withfa handle 13 for raising and lowering it from and' to locking position which preferably: should be about midway of the clamps. Therin 11 is preferalii made a loose fit within the -lined by the outer faces of the webs 8, to permit it to be easily and quickly moved to its locking position, and to insure a suitably snug engagement with the clamps when the ring has been seated u on the lugs 12, its outer surface 14 is prefera hly tapered to engage correspondingly tapered surfaces 15 formed on one or more of the clamps. The lugs 12 and tapered surfaces 15 cooperate to form a shoulder for support lllfj: the ring and producing a slight liind- Patented Dec. 31, 1918.

ing action thereof vith the lamps. The fit should not be so tight however as to prevent the ring from being easily raised when it is desired to disengage the parts.

. draulic press may be em aloyed, to force the "mold members together.

T he clamps are then placed in position, care being taken that thelugs and tapering surfaces 15 are placed in the same order to properly receive the locking member, and lastly this member is placed in its looking position upon the lugs 14: and the rlamps thereby held socurely in their respective positions.

As many apparently widely dillerent embodiments of this invention may be made without departing from the spirit thereof, it is to, be understood that I do not intend to limit myself to the specific form of embodiment of the invention herein described. l

Having tlu s described my invention What I claim and desire to protect by Letters Patent is: y

1. A mold for vulcanizing tire casings comprising outer mold members, clamps holding said members together, and means inde endent of and separable from said mem ers directly engaging each clamp to hold it in position.

2. A mold for vulcanizing tire casings comprising outer mold members, clamps holding said members together, and means independent of and separable from said members spanning the clamps and in en gagement withcach clamp to hold it in position.

3. A mold for vulcanizing tire casings comprising outer mold 1 embers, clamps arranged in a circumferemze for holding said members together, and. means independent of and separable from said membersdirectly engaging each clamp to hold it against rarial movement.

4. A mold for vulcamznig tire casings comprising outer mold members, clamps holding said members together, and means independent of and separable from said members abutting each of said clamps to prevent movement thereof toward the said means.

5. A mold for vulcanizing tire casings comprising outer mold members, clamps holding said members together, and aband engaging the clamps to hold them in position.

6. A mold for vulcanizing tire casings comprising outer mold members, clamps holding said members together, a band on gaging the clamps to hold them in position, and means for supporting the band.

7. A mold for vulcanizing tire casings comprising outer mold members, clamps holding said members tor ether, a band engaging the clamps to hold them in position having a tapered surface engaging a correspondingly tapered surface formed on the clamps.

8. A mold for vulcanizing tire casing comprising outer mold members, clamps holding said members together, a band eugaging the clamps to hold them in position, and lugs secured to the clamps for supporting the band.

9. A. mold for vulcanizing tire casings comprising outer mold members, clamps arranged in a circumference for holding said members together and provided With a shoulder having a circumferential wall thereof tapering outwardly, and a band adapted to sit in said shoulder andhaving a tapered surface to engage the tapered surface thereof.

10. A mold for vulcanizing tire casings comprising outer mold members, clamps arranged in a circumference for holding said members together on the inner side of said mold members, and a band engaging the clamps on their inner circumference for holding them. in position.

Signed at New York, N. Y., this 30th day of January, 1918.

POPKINSON. 

